#!/usr/bin/env bash
#==========================================================================
#
#   Copyright NumFOCUS
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#          https://www.apache.org/licenses/LICENSE-2.0.txt
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.
#
#==========================================================================*/

egrep-q() {
  egrep "$@" >/dev/null 2>/dev/null
}

die() {
  echo 'pre-commit hook failure' 1>&2
  echo '-----------------------' 1>&2
  echo '' 1>&2
  echo "$@" 1>&2
  exit 1
}

#-----------------------------------------------------------------------------

# Check that developer setup is up-to-date.
lastSetupForDevelopment=$(git config --get hooks.SetupForDevelopment || echo 0)
eval $(grep '^SetupForDevelopment_VERSION=' "${BASH_SOURCE%/*}/../SetupForDevelopment.sh")
top_level_dir=$(git rev-parse --show-toplevel)
test -n "$SetupForDevelopment_VERSION" || SetupForDevelopment_VERSION=0
if test $lastSetupForDevelopment -lt $SetupForDevelopment_VERSION; then
  die "Developer setup in this work tree is out of date.  Please re-run

  \"$top_level_dir/Utilities/SetupForDevelopment.sh\"
"
fi

#-----------------------------------------------------------------------------
# Check files added by commit

added=$(git diff-index --diff-filter=A --cached HEAD --)
added_normal=$(echo "$added" | grep -v '^:...... 160000')
added_module=$(echo "$added" | grep    '^:...... 160000')

# Do not allow adding of files with .txx extension.
added_txx=$(echo "$added_normal" | grep '\.txx$')
bad=$(
  test -n "$added_txx" &&
  echo "Files with the .txx extension are deprecated -- please use .hxx instead:" &&
  echo "$added_txx" | awk '{printf("  %s\n",$6)}'
)
test -z "$bad" || die "$bad"

# Do not allow addition of submodules.
bad=$(
  test -n "$added_module" &&
  echo "Submodules may not be added to ITK at this time:" &&
  echo "$added_module" | awk '{printf("  %s\n",$6)}'
)
test -z "$bad" || die "$bad"

#-----------------------------------------------------------------------------
# Style hooks.
. "${BASH_SOURCE%/*}/pre-commit-style.bash"
